Improved dental articulating-cuf



dilated 'garnet aient @twine VON BONHORST, OF LANCASTER, OHIO.

Letters Patent No. 90,706, dated June 1, 1869; antedated May 15, 1869.

IIVIPROVED DENTAL ARTICULATING-CUR The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Ythe same Figure 2 is a vertical section through the same; and Figure represen ts a perspective view ofruyimproved articulating-cup detached.

Similarletters of reference denote correspondin g parts wherever they are used.

The purpose, or objectof my invention is to facilitate the operation of getting the true bite of the mouth, in such manner as to save time and labor to the dentist, in the process of inserting and properly fitting artificial teeth, and to obviate the neeessityfor i'equent visits on the part of the patient during such process; and consists in the provision of means whereby the dentist is enabled, after the first sitting, to determine, in the absence of the patient, the exact position of the jaws, or bite of the mouth to which the teeth are to be adapted.

In vthe accompanying drawing- A represents my improved articulating-cup, made of any suitable material, such as metal or porcelain, and of a shape conforming in its general outline to the curvature of the alveolar ridges of the upper and lower jaws of the mouth.

`It Vis composed of a thin horizontal centre, or baseplate, a, and outer and inner anges, or ribs, b c, on both its upper and lower faces.

The outer flanges, b b, are represented as approaching an angle of about ninety degrees to the base a, but they may be made to vary therefrom, Haring outward or setting inward, and the inner flanges, or ribs c, may be dispensed with, if desired, and any one or all of the flanges, or ribs may be varied in depth, during their whole extent orin any part thereof, as may be found advisable, to adapt them to thevarious forms of mouth to which they may be applied.

The form represented is considered a favorable one for the purpose of retaining the wax, B, which is to be applied thereto as shown in figs. 1 and 2, and in which the bite 7 of the mouth is to be received and retained, as hereinafter set forth.

C represents an articnlator, which may be of any usual or preferred construction, provided with an adjusting set-screw, D, by means of which the relation,

or distance apart ofthe two jaws of the articulator is regulated.

E represents the casts applied to the articulator.

The impressions for these casts are taken, and the casts themselves are obtained, or made in the usual manner.

The front, or-face of the articulating-cup is graduated, or provided with a number of horizontal marks, d, numbered in any suitable manner, for the purpose of enabling the dentist to note the length of the upper lip, when the cup is applied to the patients mouth, after the bite has been obtained, and while the mouth is in its natural position, determined bythe judgment of the dentist.v

e represents the median line,lnoted or drawn on the wax while the articulating-cup is in the patients mouth, and afterward transferred or extended to the upper cast, at e, after the casts have been applied to the' articulator; and

f represents a linedrawn on the upper cast, at right angles to the median line, as a point to measure from in determining the length of the teeth, as hereinafter described.

The manner of operating or making nseof theartieulating-cup is as follows:

I place soft wax in the upper part of the cup, and

get au impression ofthe alveolar ridge of the upper l jaw; then remove the cup, and place it in cold water, for the-purpose of hardening the waxand preserving the impression thus obtained. Then place soft or warm wax in the lower part of the cup, and replace the cup in the mouth, in the position it occupied before, and close the lower jaw in the wax until the mouth assumes its natural position, taking care to press the chin well back when the patient iirstbegins to bite in the wax. The cup is now ready for use, and

can be set away until the dentist is ready, with his casts, for the operation of fitting the teeth, after the casts have been made in the usual Way, 'as above stated. If for whole upper and lower set, adjust the casts to the bite in the articulating-cup; with a warm knife fasten the edges of the wax to the casts, so as to keep them in position; then attach thecasts to the articulator in the usual manner.

Before removing the articulating-cup from the casts, I

make a mark, e', on the upper cast, opposite the media-n linee, as marked on the rim of Wax when the bite was taken. Then draw a line, f, on said upper cast, across the median line, as av point to measure from, and with dividers measure from said point to the number on the scale on the articulating-cup, which indicated the length of the upper lip at the time of taking the bite. This measurement is to be preserved, for regulating the length of the teeth.

The bite for either upper or lower set .of teeth alone,

"is taken-in the same manner as for a full set.

After the casts have been applied to the articulator as set forth, and before removing the articulating-cup and bite therefrom, the set-screw'D should be adj usted to retain the casts at the proper distance from each 2. The articulating-cup, provided with a graduated scale, for indicating the length of the upper lip, and of the teeth to be inserted, substantially as described.

In testimony whereof, Witness my hand, this 29th day of August, 1868 DR. U. VON BONHORST.

Witnesses: v

H. H. DOUBLEDAY, ALEX. MAHON. 

